We used to only go to Pizza Planet, but even that was lacking on our last trip. I'm going to try Backlot Express in August, or the hot dog stand outside of Tower of Terror.
I think a new place open near the stunt show but I have no idea what they offer. That might be an option for you.
If you're looking for a REAL break, leave the park, take the boat to the Beach/Yacht Clubs and eat at either Beaches and Cram or Yacht Club Galley, then take the boat back to MGM.